Additive mixture

ABSTRACT

An additive mixture containing (A) at least one compound of the formula (I) wherein R 1  and R 2  independently of one another are hydrogen, C 1 -C 22 alkyl, —O—, —OH, —CH2CN, C 1 -C 18 alkoxy, C 2 -C 18 alkoxy substituted by —OH; C 5 -C 12 cycloalkoxy, C 3 -C 6 alkenyl, C 3 -C 6 alkenyloxy, C 7 -C 9 phenylalkyl unsubstituted or substituted on the phenyl by 1, 2 or 3 C 1 -C 4 alkyl; or C 1 -C 8 acyl; and R 3  and R 4  independently of one another are C 1 -C 22 alkyl or a group of the formula (Ia) wherein R 0  has one of the meanings of R 1  and R 2 , and (B) at least one anti-scratch additive.

The present invention relates to an additive mixture containing a specific sterically hindered amine compound and an anti-scratch additive, a composition containing an organic material susceptible to degradation induced by light, heat or oxidation and the additive mixture, as well as an article made of said composition and the use of the additive mixture for stabilizing an organic material against light, heat or oxidation. The articles made of the composition according to the present invention have a long-term essentially tackiness free surface with no or reduced blooming.

Suitable sterically hindered amine compounds are for example described in WO-A-2015/055,563.

The present invention relates in particular to an additive mixture containing

(A) at least one compound of the formula (I)

wherein R₁ and R₂ independently of one another are hydrogen, C₁-C₂₂alkyl, —O—, —OH, —CH₂CN, C₁-C₁₈alkoxy, C₂-C₁₈alkoxy substituted by —OH; C₅-C₁₂cycloalkoxy, C₃-C₆alkenyl, C₃-C₆alkenyloxy, C₇-C₉phenylalkyl unsubstituted or substituted on the phenyl by 1, 2 or 3 C₁-C₄alkyl; or C₁-C₈acyl; and R₃ and R₄ independently of one another are C₁-C₂₂alkyl or a group of the formula (Ia)

wherein R₀ has one of the meanings of R₁ and R₂; and (B) at least one anti-scratch additive.

Anti-scratch additives are agents which improve the scratch resistance of plastics. The group of anti-scratch additives is well known, in particular for improving the scratch resistance of automotive thermoplastic polyolefins (automotive TPO's). An anti-scratch additive can also be named as for example scratch-resistant additive.

The weight ratio of components (A):(B) is for example 1:30 to 30:1, 1:20 to 20:1 or 1:10 to 10:1, preferably 1:5 to 5:1, in particular, 1:3 to 3:1.

Examples of alkyl having up to 22 carbon atoms are methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, 2-ethylbutyl, n-pentyl, isopentyl, 1-methylpentyl, 1,3-dimethylbutyl, n-hexyl, 1-methylhexyl, n-heptyl, isoheptyl, 1,1,3,3-tetramethylbutyl, 1-methylheptyl, 3-methylheptyl, n-octyl, 2-ethylhexyl, 1,1,3-trimethylhexyl, 1,1,3,3-tetramethylpentyl, nonyl, decyl, undecyl, 1-methylundecyl, dodecyl, 1,1,3,3,5,5-hexamethylhexyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl and eicosyl. One preferred meaning is C₁-C₄alkyl. R₁ and R₂ are preferably methyl and R₃ and R₄ are preferably n-butyl.

Examples of alkoxy having up to 18 carbon atoms are methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, pentoxy, isopentoxy, hexoxy, heptoxy, octoxy, decyloxy, dodecyloxy, tetradecyloxy, hexadecyloxy and octadecyloxy. Preferred meanings of R₀, R₁ and R₂ are methoxy, ethoxy, propoxy, octoxy or undecyloxy.

Examples of C₃-C₆alkenyloxy are 1-propenyloxy and 2-propenyloxy.

An examples of C₂-C₁₈alkoxy substituted by —OH is 2-hydroxy-2-methylpropyloxy.

Examples of C₅-C₁₂cycloalkoxy are cyclopentoxy, cyclohexoxy, cycloheptoxy, cyclooctoxy, cyclodecyloxy and cyclododecyloxy. C₅-C₈Cycloalkoxy, in particular cyclopentoxy and cyclohexoxy, is preferred.

Examples of C₇-C₉phenylalkyl are benzyl and 2-phenylethyl.

C₇-C₉Phenylalkyl which is substituted on the phenyl radical by 1, 2 or 3 C₁-C₄alkyl is for example methylbenzyl, dimethylbenzyl, trimethylbenzyl or tert-butylbenzyl.

Examples of C₃-C₆alkenyl are allyl, 2-methallyl, butenyl, pentenyl and hexenyl. Allyl is preferred. The carbon atom in position 1 is preferably saturated.

Examples of C₁-C₈acyl are formyl, acetyl, propionyl, butyryl, pentanoyl, hexanoyl, heptanoyl, octanoyl, acryloyl, methacryloyl and benzoyl. C₁-C₈Alkanoyl, C₃-C₈alkenoyl and benzoyl are preferred. Acetyl and acryloyl are especially preferred.

A compound of the formula (I) wherein R₁ and R₂ independently of one another are hydrogen, C₁-C₈alkyl, C₁-C₁₈alkoxy or cyclohexyloxy and R₃ and R₄ independently of one another are C₁-C₆alkyl is preferred.

The compound of the formula (I) is preferably a compound of the formula (A).

The compounds of the formula (I) can be prepared in analogy to known methods, e.g. as described in WO-A-2015/055563 by reacting a compound of the formula (II)

with pyrrolidine in an organic solvent, optionally in the presence of an organic or inorganic base.

According to a preferred embodiment the compound of the formula (II) is reacted with e.g. 0.8 to 5 equivalent of pyrrolidine in an organic solvent, for example toluene, xylene, chlorobenzene, nitrobenzene, mesitylene, ethylbenzene, an alcohol such as methanol, ethanol, n-propanol, i-propanol, n-butanol, t-butanol; N-methyl-2-pyrrolidone, dimethylformamide, 1,4-dioxane, an ester or pyrrolidine; with or without water, in the presence of e.g. 0 to 10 equivalent of an alkali metal hydroxide such as LiOH, NaOH, KOH; a carbonate or hydrogen carbonate such as NaHCO₃, Na₂CO₃, K₂CO₃; a solid base, a zeolite, an ion-exchange resin, an amine based base or an organic base. The concentration of the compound of the formula (II) in the organic solvent is preferably 0.1-3 molar. The reaction can be carried out e.g. under atmospheric pressure or an elevated pressure up to 60 bar. The used temperatures vary between e.g. 30° C. and 180° C. in dependence on the reaction time of e.g. 2 h to 24 h.

The starting materials of the formula (II) can be prepared in analogy to known methods, e.g. as described in U.S. Pat. No. 5,268,401.

Examples of anti-scratch additives are saturated or unsaturated fatty acid amides, e.g. erucamide, oleamide and stearamide, as well as a poly(organo)siloxane and mixtures thereof.

The anti-scratch additives of the present invention are known to those skilled in the art.

They can be prepared in analogy to known methods. Most of them are commercially available.

Preferred commercially available poly(organo)siloxane anti-scratch additives are:

TEGOMER® AntiScratch 100, TEGOMER® M-Si 2650, TEGOPREN® 6846, TEGOMER® H-Si 6440 P, TEGOMER® AntiScratch 200, GENIOPLAST® S, GENIOPLAST® Pellet P and

GENIOPLAST® Pellet P plus.

A preferred poly(organo)siloxane anti-scratch additive relates to a mixture of silicia and silicone polymer (e.g. 0-50 weight %, preferably 30 weight %, of fumed silicia and 50 to 0 weight %, preferably 70 weight %, of silicone polymer).

Further preferred poly(organo)siloxane anti-scratch additives are compounds of the formula

wherein R is alkyl, a polyester residue, an acrylate residue, epoxy, hydroxyalkyl, aminoalkyl, etc.

Another preferred anti-scratch additive is IRGASURF® SR 100.

A particularly preferred additive mixture of the present invention contains a compound of the formula (A) and the anti-scratch additive erucamide or oleamide.

The anti-scratch additive can also be present in the additive mixture of the present invention in the form of a masterbatch. An anti-scratch masterbatch contains for example an organic polymer and up to 50% by weight, relative to the weight of the organic polymer, of the anti-scratch additive.

A further embodiment of the present invention is a composition containing an organic material susceptible to degradation induced by light, heat and oxidation and the additive mixture according to the present invention.

Examples of organic materials which can be stabilized:

1. Polymers of monoolefins and diolefins, for example polypropylene, polyisobutylene, polybut-1-ene, poly-4-methylpent-1-ene, polyvinylcyclohexane, polyisoprene or polybutadiene, as well as polymers of cycloolefins, for instance of cyclopentene or norbornene, polyethylene (which optionally can be crosslinked), for example high density polyethylene (HDPE), high density and high molecular weight polyethylene (HDPEHMW), high density and ultrahigh molecular weight polyethylene (HDPE-UHMW), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), (VLDPE) and (ULDPE).

Polyolefins, i.e. the polymers of monoolefins exemplified in the preceding paragraph, preferably polyethylene and polypropylene, can be prepared by different, and especially by the following, methods:

-   -   a) radical polymerisation (normally under high pressure and at         elevated temperature).     -   b) catalytic polymerisation using a catalyst that normally         contains one or more than one metal of groups IVb, Vb, VIb or         VIII of the Periodic Table. These metals usually have one or         more than one ligand, typically oxides, halides, alcoholates,         esters, ethers, amines, alkyls, alkenyls and/or aryls that may         be either π- or σ-coordinated. These metal complexes may be in         the free form or fixed on substrates, typically on activated         magnesium chloride, titanium(III) chloride, alumina or silicon         oxide. These catalysts may be soluble or insoluble in the         polymerisation medium. The catalysts can be used by themselves         in the polymerisation or further activators may be used,         typically metal alkyls, metal hydrides, metal alkyl halides,         metal alkyl oxides or metal alkyloxanes, said metals being         elements of groups Ia, IIa and/or IIIa of the Periodic Table.         The activators may be modified conveniently with further ester,         ether, amine or silyl ether groups. These catalyst systems are         usually termed Phillips, Standard Oil Indiana, Ziegler (-Natta),         TNZ (DuPont), metallocene or single site catalysts (SSC).         2. Mixtures of the polymers mentioned under 1), for example         mixtures of polypropylene with polyisobutylene, polypropylene         with polyethylene (for example PP/HDPE, PP/LDPE) and mixtures of         different types of polyethylene (for example LDPE/HDPE).         3. Copolymers of monoolefins and diolefins with each other or         with other vinyl monomers, for example ethylene/propylene         copolymers, linear low density polyethylene (LLDPE) and mixtures         thereof with low density polyethylene (LDPE),         propylene/but-1-ene copolymers, propylene/isobutylene         copolymers, ethylene/but-1-ene copolymers, ethylene/hexene         copolymers, ethylene/methylpentene copolymers, ethylene/heptene         copolymers, ethylene/octene copolymers,         ethylene/vinylcyclohexane copolymers, ethylene/cycloolefin         copolymers (e.g. ethylene/norbornene like COC),         ethylene/1-olefins copolymers, where the 1-olefin is generated         in-situ; propylene/butadiene copolymers, isobutylene/isoprene         copolymers, ethylene/vinylcyclohexene copolymers, ethylene/alkyl         acrylate copolymers, ethylene/alkyl methacrylate copolymers,         ethylene/vinyl acetate copolymers or ethylene/acrylic acid         copolymers and their salts (ionomers) as well as terpolymers of         ethylene with propylene and a diene such as hexadiene,         dicyclopentadiene or ethylidene-norbornene; and mixtures of such         copolymers with one another and with polymers mentioned in 1)         above, for example polypropylene/ethylenepropylene copolymers,         LDPE/ethylene-vinyl acetate copolymers (EVA),         LDPE/ethylene-acrylic acid copolymers (EAA), LLDPE/EVA,         LLDPE/EAA and alternating or random polyalkylene/carbon monoxide         copolymers and mixtures thereof with other polymers, for example         polyamides.         4. Hydrocarbon resins (for example C₅-C₉) including hydrogenated         modifications thereof (e.g. tackifiers) and mixtures of         polyalkylenes and starch.

Homopolymers and copolymers from 1.)-4.) may have any stereostructure including syndiotactic, isotactic, hemi-isotactic or atactic; where atactic polymers are preferred. Stereoblock polymers are also included.

5. Polystyrene, poly(p-methylstyrene), poly(α-methylstyrene). 6. Aromatic homopolymers and copolymers derived from vinyl aromatic monomers including styrene, α-methylstyrene, all isomers of vinyl toluene, especially pvinyltoluene, all isomers of ethyl styrene, propyl styrene, vinyl biphenyl, vinyl naphthalene, and vinyl anthracene, and mixtures thereof. Homopolymers and copolymers may have any stereostructure including syndiotactic, isotactic, hemi-isotactic or atactic; where atactic polymers are preferred. Stereoblock polymers are also included. 6a. Copolymers including aforementioned vinyl aromatic monomers and comonomers selected from ethylene, propylene, dienes, nitriles, acids, maleic anhydrides, maleimides, vinyl acetate and vinyl chloride or acrylic derivatives and mixtures thereof, for example styrene/butadiene, styrene/acrylonitrile, styrene/ethylene (interpolymers), styrene/alkyl methacrylate, styrene/butadiene/alkyl acrylate, styrene/butadiene/alkyl methacrylate, styrene/maleic anhydride, styrene/acrylonitrile/methyl acrylate; mixtures of high impact strength of styrene copolymers and another polymer, for example a polyacrylate, a diene polymer or an ethylene/propylene/diene terpolymer; and block copolymers of styrene such as styrene/butadiene/styrene, styrene/isoprene/styrene, styrene/ethylene/butylene/styrene or styrene/ethylene/propylene/styrene. 6b. Hydrogenated aromatic polymers derived from hydrogenation of polymers mentioned under 6.), especially including polycyclohexylethylene (PCHE) prepared by hydrogenating atactic polystyrene, often referred to as polyvinylcyclohexane (PVCH). 6c. Hydrogenated aromatic polymers derived from hydrogenation of polymers mentioned under 6a.).

Homopolymers and copolymers may have any stereostructure including syndiotactic, isotactic, hemi-isotactic or atactic; where atactic polymers are preferred. Stereoblock polymers are also included.

7. Graft copolymers of vinyl aromatic monomers such as styrene or α-methylstyrene, for example styrene on polybutadiene, styrene on polybutadiene-styrene or polybutadiene-acrylonitrile copolymers; styrene and acrylonitrile (or methacrylonitrile) on polybutadiene; styrene, acrylonitrile and methyl methacrylate on polybutadiene; styrene and maleic anhydride on polybutadiene; styrene, acrylonitrile and maleic anhydride or maleimide on polybutadiene; styrene and maleimide on polybutadiene; styrene and alkyl acrylates or methacrylates on polybutadiene; styrene and acrylonitrile on ethylene/propylene/diene terpolymers; styrene and acrylonitrile on polyalkyl acrylates or polyalkyl methacrylates, styrene and acrylonitrile on acrylate/butadiene copolymers, as well as mixtures thereof with the copolymers listed under 6), for example the copolymer mixtures known as ABS, MBS, ASA or AES polymers. 8. Halogen-containing polymers such as polychloroprene, chlorinated rubbers, chlorinated and brominated copolymer of isobutylene-isoprene (halobutyl rubber), chlorinated or sulfochlorinated polyethylene, copolymers of ethylene and chlorinated ethylene, epichlorohydrin homo- and copolymers, especially polymers of halogen-containing vinyl compounds, for example polyvinyl chloride, polyvinylidene chloride, polyvinyl fluoride, polyvinylidene fluoride, as well as copolymers thereof such as vinyl chloride/vinylidene chloride, vinyl chloride/vinyl acetate or vinylidene chloride/vinyl acetate copolymers. 9. Polymers derived from α,β-unsaturated acids and derivatives thereof such as polyacrylates and polymethacrylates; polymethyl methacrylates, polyacrylamides and polyacrylonitriles, impact-modified with butyl acrylate. 10. Copolymers of the monomers mentioned under 9) with each other or with other unsaturated monomers, for example acrylonitrile/butadiene copolymers, acrylonitrile/alkyl acrylate copolymers, acrylonitrile/alkoxyalkyl acrylate or acrylonitrile/vinyl halide copolymers or acrylonitrile/alkyl methacrylate/butadiene terpolymers. 11. Polymers derived from unsaturated alcohols and amines or the acyl derivatives or acetals thereof, for example polyvinyl alcohol, polyvinyl acetate, polyvinyl stearate, polyvinyl benzoate, polyvinyl maleate, polyvinyl butyral, polyallyl phthalate or polyallyl melamine; as well as their copolymers with olefins mentioned in 1) above. 12. Homopolymers and copolymers of cyclic ethers such as polyalkylene glycols, polyethylene oxide, polypropylene oxide or copolymers thereof with bisglycidyl ethers. 13. Polyacetals such as polyoxymethylene and those polyoxymethylenes which contain ethylene oxide as a comonomer; polyacetals modified with thermoplastic polyurethanes, acrylates or MBS. 14. Polyphenylene oxides and sulfides, and mixtures of polyphenylene oxides with styrene polymers or polyamides. 15. Polyurethanes derived from hydroxyl-terminated polyethers, polyesters or polybutadienes on the one hand and aliphatic or aromatic polyisocyanates on the other, as well as precursors thereof. 16. Polyamides and copolyamides derived from diamines and dicarboxylic acids and/or from aminocarboxylic acids or the corresponding lactams, for example polyamide 4, polyamide 6, polyamide 6/6, 6/10, 6/9, 6/12, 4/6, 12/12, polyamide 11, polyamide 12, aromatic polyamides starting from m-xylene diamine and adipic acid; polyamides prepared from hexamethylenediamine and isophthalic or/and terephthalic acid and with or without an elastomer as modifier, for example poly-2,4,4,-trimethylhexamethylene terephthalamide or poly-m-phenylene isophthalamide; and also block copolymers of the aforementioned polyamides with polyolefins, olefin copolymers, ionomers or chemically bonded or grafted elastomers; or with polyethers, e.g. with polyethylene glycol, polypropylene glycol or polytetramethylene glycol; as well as polyamides or copolyamides modified with EPDM or ABS; and polyamides condensed during processing (RIM polyamide systems). 17. Polyureas, polyimides, polyamide-imides, polyetherimides, polyesterimides, polyhydantoins and polybenzimidazoles. 18. Polyesters derived from dicarboxylic acids and diols and/or from hydroxycarboxylic acids or the corresponding lactones or lactides, for example polyethylene terephthalate, polybutylene terephthalate, poly-1,4-dimethylolcyclohexane terephthalate, polyalkylene naphthalate and polyhydroxybenzoates as well as copolyether esters derived from hydroxyl-terminated polyethers, and also polyesters modified with polycarbonates or MBS. Copolyesters may comprise, for example—but are not limited to—polybutylenesuccinate/terephtalate, polybutyleneadipate/terephthalate, polytetramethyleneadipate/terephthalate, polybutylensuccinate/adipate, polybutylensuccinate/carbonate, poly-3-hydroxybutyrate/octanoate copolymer, poly-3-hydroxybutyrate/hexanoate/decanoate terpolymer. Furthermore, aliphatic polyesters may comprise, for example—but are not limited to—the class of poly(hydroxyalkanoates), in particular, poly(propiolactone), poly(butyrolactone), poly(pivalolactone), poly(valerolactone) and poly(caprolactone), polyethylenesuccinate, polyethylenefuranoate, polypropylenesuccinate, polybutylenesuccinate, polyhexamethylenesuccinate, polyethyleneadipate, polypropyleneadipate, polybutyleneadipate, polyhexamethyleneadipate, polyethyleneoxalate, polypropyleneoxalate, polybutyleneoxalate, polyhexamethyleneoxalate, polyethylenesebacate, polypropylenesebacate, polybutylenesebacate and polylactic acid (PLA) as well as corresponding polyesters modified with polycarbonates or MBS. The term “polylactic acid (PLA)” designates a homo-polymer of preferably poly-L-lactide and any of its blends or alloys with other polymers; a co-polymer of lactic acid or lactide with other monomers, such as hydroxycarboxylic acids, like for example glycolic acid, 3-hydroxy-butyric acid, 4-hydroxybutyric acid, 4-hydroxy-valeric acid, 5-hydroxy-valeric acid, 6-hydroxy-caproic acid and cyclic forms thereof; the terms “lactic acid” or “lactide” include L-lactic acid, D-lactic acid, mixtures and dimers thereof, i.e. L-lactide, D-lactide, meso-lacide and any mixtures thereof. 19. Polycarbonates and polyester carbonates.

20. Polyketones.

21. Polysulfones, polyether sulfones and polyether ketones. 22. Crosslinked polymers derived from aldehydes on the one hand and phenols, ureas and melamines on the other hand, such as phenol/formaldehyde resins, urea/formaldehyde resins and melamine/formaldehyde resins. 23. Drying and non-drying alkyd resins. 24. Unsaturated polyester resins derived from copolyesters of saturated and unsaturated dicarboxylic acids with polyhydric alcohols and vinyl compounds as crosslinking agents, and also halogen-containing modifications thereof of low flammability. 25. Crosslinkable acrylic resins derived from substituted acrylates, for example epoxy acrylates, urethane acrylates or polyester acrylates. 26. Alkyd resins, polyester resins and acrylate resins crosslinked with melamine resins, urea resins, isocyanates, isocyanurates, polyisocyanates or epoxy resins. 27. Crosslinked epoxy resins derived from aliphatic, cycloaliphatic, heterocyclic or aromatic glycidyl compounds, e.g. products of diglycidyl ethers of bisphenol A and bisphenol F, which are crosslinked with customary hardeners such as anhydrides or amines, with or without accelerators. 28. Natural polymers such as cellulose, rubber, gelatin and chemically modified homologous derivatives thereof, for example cellulose acetates, cellulose propionates and cellulose butyrates, or the cellulose ethers such as methyl cellulose; as well as rosins and their derivatives. 29. Blends of the aforementioned polymers (polyblends), for example PP/EPDM, Polyamide/EPDM or ABS, PVC/EVA, PVC/ABS, PVC/MBS, PC/ABS, PBTP/ABS, PC/ASA, PC/PBT, PVC/CPE, PVC/acrylates, POM/thermoplastic PUR, PC/thermoplastic PUR, POM/acrylate, POM/MBS, PPO/HIPS, PPO/PA 6.6 and copolymers, PA/HDPE, PA/PP, PA/PPO, PBT/PC/ABS or PBT/PET/PC. 30. Naturally occurring and synthetic organic materials which are pure monomeric compounds or mixtures of such compounds, for example mineral oils, animal and vegetable fats, oil and waxes, or oils, fats and waxes based on synthetic esters (e.g. phthalates, adipates, phosphates or trimellitates) and also mixtures of synthetic esters with mineral oils in any weight ratios, typically those used as spinning compositions, as well as aqueous emulsions of such materials. 31. Aqueous emulsions of natural or synthetic rubber, e.g. natural latex or latices of carboxylated styrene/butadiene copolymers.

A polyolefin, an acrylonitrile/butadiene/styrene, a polyvinyl chloride, a polymethylmethacrylate, a polyamide or a polyoxymethylene are of special interest.

According to a preferred embodiment the organic material is a thermoplastic elastomer.

Examples of thermoplastic elastomers include polyolefin thermoplastic elastomers and block copolymer-type polystyrene thermoplastic elastomers. The polyolefin thermoplastic elastomers comprise polyolefin resins such as polypropylene and polyethylene serving as hard segments and rubber compositions such as ethylene-propylene-diene-elastomer (EPDM) serving as soft segments. The block copolymer-type polystyrene thermoplastic elastomer comprises polystyrene serving as hard segments and polydienes such as polybutadiene or polyisoprene serving as soft segments.

Alternatively, a blend of the polyolefin elastomers and the polystyrene elastomers may also be used as the thermoplastic elastomer of the present invention. The methods for combining soft segments and hard segments in thermoplastic elastomers may be roughly divided into simple blending, implantation by copolymerization, and dynamic cross-linking. Combinations of segments of polystyrene thermoplastic elastomers include a styrene-butadiene-styrene block copolymer (SBS), a styrene-isoprene-styrene block copolymer (SIS), a styrene-ethylene butylene-styrene block copolymer (SEBS), a styrene-ethylene propylene-styrene block copolymer (SEPS), a hydrogenated polymer of any one of the four copolymers, a hydrogenated polymer of random SBR (HSBR), and a blend of polypropylene and one or more arbitrary members selected from among these polymers. (SBR=styrene butadiene rubber)

Of interest is a thermoplastic polyolefin, in particular polyethylene or polypropylene containing a rubber phase based on ethylene and/or propylene.

The compound of the formula (I) and the anti-scratch can be used in various proportions depending on the nature of the organic material to be stabilized, on the end use and on the presence of other additives.

In general, it is appropriate to use, for example, 0.01 to 5% by weight of a compound of the formula (I), relative to the weight of the organic material to be stabilized, preferably 0.05 to 2%, in particular 0.05 to 1%. Further, it is appropriate to use, for example, 0.001 to 10% by weight of the anti-scratch additive, relative to the weight of the organic material to be stabilized, preferably 0.1 to 10% by weight, in particular 0.1 to 6% by weight.

The compounds of the formula (I) and the anti-scratch additive can be added, for example, to polymeric materials before, during or after the polymerization or crosslinking of the said materials. Furthermore, they can be incorporated in the polymeric materials in the pure form or encapsulated in waxes, oils or polymers.

In general, the compounds of the formula (I) and the anti-scratch additive can be incorporated together or in individual form into the organic materials by various processes, such as dry mixing in the form of powder, or wet mixing in the form of solutions or suspensions or also in the form of a masterbatch which contains the compounds of the formula (I) and/or the anti-scratch additive in a concentration of 2.5 to 70%, preferably 2.5 to 50%, in particular 2.5 to 25%, by weight; in such operations, the polymer can be used in the form of powder, granules, solutions, suspensions or in the form of latices.

Examples of processing of the compositions according to the present invention are:

Injection blow molding, extrusion, blow molding, rotomolding, in mold decoration (back injection), slush molding, injection molding, co-injection molding, forming, compression molding, pressing, film extrusion (cast film; blown film), fiber spinning (woven, nonwoven), drawing (uniaxial, biaxial), annealing, deep drawing, calandering, mechanical transformation, sintering, coextrusion, coating, lamination, crosslinking (radiation, peroxide, silane), vapor deposition, weld together, glue, vulcanization, thermoforming, pipe extrusion, profile extrusion, sheet extrusion; sheet casting, spin coating, strapping, foaming, recycling/rework, extrusion coating, visbreaking (peroxide, thermal), fiber melt blown, spun bonded, surface treatment (corona discharge, flame, plasma), sterilization (by gamma rays, electron beams), gel-coating, tape extrusion, SMC-process or plastisol.

The compositions according to the present invention can be advantageously used for the preparation of various shaped articles. Examples:

I-1) Floating devices, marine applications, pontoons, buoys, plastic lumber for decks, piers, boats, kayaks, oars, and beach reinforcements. I-2) Automotive applications, in particular bumpers, dashboards, battery, rear and front linings, moldings parts under the hood, hat shelf, trunk linings, interior linings, air bag covers, electronic moldings for fittings (lights), panes for dashboards, headlamp glass, instrument panel, exterior linings, upholstery, automotive lights, head lights, parking lights, rear lights, stop lights, interior and exterior trims; door panels; gas tank; glazing front side; rear windows; seat backing, exterior panels, wire insulation, profile extrusion for sealing, cladding, pillar covers, chassis parts, exhaust systems, fuel filter/filler, fuel pumps, fuel tank, body side mouldings, convertible tops, exterior mirrors, exterior trim, fasteners/fixings, front end module, glass, hinges, lock systems, luggage/roof racks, pressed/stamped parts, seals, side impact protection, sound deadener/insulator and sunroof. I-3) Road traffic devices, in particular sign postings, posts for road marking, car accessories, warning triangles, medical cases, helmets, tires. I-4) Devices for plane, railway, motor car (car, motorbike) including furnishings. I-5) Devices for space applications, in particular rockets and satellites, e.g. reentry shields. I-6) Devices for architecture and design, mining applications, acoustic quietized systems, street refuges, and shelters. II-1) Appliances, cases and coverings in general and electric/electronic devices (personal computer, telephone, portable phone, printer, television-sets, audio and video devices), flower pots, satellite TV bowl, and panel devices. II-2) Jacketing for other materials such as steel or textiles. II-3) Devices for the electronic industry, in particular insulation for plugs, especially computer plugs, cases for electric and electronic parts, printed boards, and materials for electronic data storage such as chips, check cards or credit cards. II-4) Electric appliances, in particular washing machines, tumblers, ovens (microwave oven), dish-washers, mixers, and irons. II-5) Covers for lights (e.g. street-lights, lamp-shades). II-6) Applications in wire and cable (semi-conductor, insulation and cable-jacketing). II-7) Foils for condensers, refrigerators, heating devices, air conditioners, encapsulating of electronics, semi-conductors, coffee machines, and vacuum cleaners. III-1) Technical articles such as cogwheel (gear), slide fittings, spacers, screws, bolts, handles, and knobs. III-2) Rotor blades, ventilators and windmill vanes, solar devices, swimming pools, swimming pool covers, pool liners, pond liners, closets, wardrobes, dividing walls, slat walls, folding walls, roofs, shutters (e.g. roller shutters), fittings, connections between pipes, sleeves, and conveyor belts. III-3) Sanitary articles, in particular shower cubicles, lavatory seats, covers, and sinks. III-4) Hygienic articles, in particular diapers (babies, adult incontinence), feminine hygiene articles, shower curtains, brushes, mats, tubs, mobile toilets, tooth brushes, and bed pans. III-5) Pipes (cross-linked or not) for water, waste water and chemicals, pipes for wire and cable protection, pipes for gas, oil and sewage, guttering, down pipes, and drainage systems. III-6) Profiles of any geometry (window panes) and siding. III-7) Glass substitutes, in particular extruded plates, glazing for buildings (monolithic, twin or multiwall), aircraft, schools, extruded sheets, window film for architectural glazing, train, transportation and sanitary articles. III-8) Plates (walls, cutting board), extrusion-coating (photographic paper, tetrapack and pipe coating), silos, wood substitute, plastic lumber, wood composites, walls, surfaces, furniture, decorative foil, floor coverings (interior and exterior applications), flooring, duck boards, and tiles. III-9) Intake and outlet manifolds. III-10) Cement-, concrete-, composite-applications and covers, siding and cladding, hand rails, banisters, kitchen work tops, roofing, roofing sheets, tiles, and tarpaulins. IV-1) Plates (walls and cutting board), trays, artificial grass, astroturf, artificial covering for stadium rings (athletics), artificial floor for stadium rings (athletics), and tapes. IV-2) Woven fabrics continuous and staple, fibers (carpets/hygienic articles/geotextiles/monofilaments; filters; wipes/curtains (shades)/medical applications), bulk fibers (applications such as gown/protection clothes), nets, ropes, cables, strings, cords, threads, safety seat-belts, clothes, underwear, gloves; boots; rubber boots, intimate apparel, garments, swimwear, sportswear, umbrellas (parasol, sunshade), parachutes, paraglides, sails, “balloon-silk”, camping articles, tents, airbeds, sun beds, bulk bags, and bags. IV-3) Membranes, insulation, covers and seals for roofs, tunnels, dumps, ponds, dumps, walls roofing membranes, geomembranes, swimming pools, curtains (shades)/sun-shields, awnings, canopies, wallpaper, food packing and wrapping (flexible and solid), medical packaging (flexible & solid), airbags/safety belts, arm- and head rests, carpets, centre console, dashboard, cockpits, door, overhead console module, door trim, headliners, interior lighting, interior mirrors, parcel shelf, rear luggage cover, seats, steering column, steering wheel, textiles, and trunk trim. V-1) Films (packaging, dump, laminating, bale wrap, swimming pools, waste bags, wallpaper, stretch film, raffia, desalination film, batteries, and connectors. V-2) Agricultural films (greenhouse covers, tunnel, mulch, silage, bale wrap), especially in presence of intensive application of agrochemicals. VI-1) Food packing and wrapping (flexible and solid), BOPP, BOPET, bottles. VI-2) Storage systems such as boxes (crates), luggage, chest, household boxes, pallets, shelves, tracks, screw boxes, packs, and cans. VI-3) Cartridges, syringes, medical applications, containers for any transportation, waste baskets and waste bins, waste bags, bins, dust bins, bin liners, wheely bins, container in general, tanks for water/used water/chemistry/gas/oil/gasoline/diesel; tank liners, boxes, crates, battery cases, troughs, medical devices such as piston, ophthalmic applications, diagnostic devices, and packing for pharmaceuticals blister. VII-1) Extrusion coating (photo paper, tetrapack, pipe coating), household articles of any kind (e.g. appliances, thermos bottle/clothes hanger), fastening systems such as plugs, wire and cable clamps, zippers, closures, locks, and snap-closures. VII-2) Support devices, articles for the leisure time such as sports and fitness devices, gymnastics mats, ski-boots, inline-skates, skis, big foot, athletic surfaces (e.g. tennis grounds); screw tops, tops and stoppers for bottles, and cans. VII-3) Furniture in general, foamed articles (cushions, impact absorbers), foams, sponges, dish clothes, mats, garden chairs, stadium seats, tables, couches, toys, building kits (boards/figures/balls), playhouses, slides, and play vehicles. VII-4) Materials for optical and magnetic data storage. VII-5) Kitchen ware (eating, drinking, cooking, storing). VII-6) Boxes for CD's, cassettes and video tapes; DVD electronic articles, office supplies of any kind (ball-point pens, stamps and ink-pads, mouse, shelves, tracks), bottles of any volume and content (drinks, detergents, cosmetics including perfumes), and adhesive tapes. VII-7) Footwear (shoes/shoe-soles), insoles, spats, adhesives, structural adhesives, food boxes (fruit, vegetables, meat, fish), synthetic paper, labels for bottles, couches, artificial joints (human), printing plates (flexographic), printed circuit boards, and display technologies. VII-8) Devices of filled polymers (talc, chalk, china clay (kaolin), wollastonite, pigments, carbon black, TiO₂, mica, nanocomposites, dolomite, silicates, glass, asbestos).

An automotive interior or exterior trim material made of a composition according to the present invention is preferred. Particularly preferred shaped articles are those listed above under 1-2. Of interest is also a facing material for a roof, seat or dashboard.

If desired, one or more conventional additives for synthetic polymers, such as antioxidants, UV absorbers, nickel stabilizers, pigments, fillers, plasticizers, corrosion inhibitors and metal deactivators, can be added to the organic materials containing the compounds of the formula (I).

Examples of conventional additives are:

1. Antioxidants

1.1. Alkylated monophenols, for example 2,6-di-tert-butyl-4-methylphenol, 2-tert-butyl-4,6-dimethylphenol, 2,6-di-tert-butyl-4-ethylphenol, 2,6-di-tert-butyl-4-n-butylphenol, 2,6-di-tert-butyl-4-isobutylphenol, 2,6-dicyclopentyl-4-methylphenol, 2-(amethylcyclohexyl)-4,6-dimethylphenol, 2,6-dioctadecyl-4-methylphenol, 2,4,6-tricyclohexylphenol, 2,6-di-tert-butyl-4-methoxymethylphenol, nonylphenols which are linear or branched in the side chains, for example, 2,6-di-nonyl-4-methylphenol, 2,4-dimethyl-6-(1′-methylundec-1′-yl)phenol, 2,4-dimethyl-6-(1′-methylheptadec-1′-yl)phenol, 2,4-dimethyl-6-(1′-methylpentadec-1′-yl)phenol, 2,4-dimethyl-6-(1′-methyltridec-1′-yl)phenol and mixtures thereof. 1.2. Alkylthiomethylphenols, for example 2,4-dioctylthiomethyl-6-tert-butylphenol, 2,4-dioctylthiomethyl-6-methylphenol, 2,4-dioctylthiomethyl-6-ethylphenol, 2,6-didodecylthiomethyl-4-nonylphenol. 1.3. Hydroquinones and alkylated hydroquinones, for example 2,6-di-tert-butyl-4-methoxyphenol, 2,5-di-tert-butylhydroquinone, 2,5-di-tert-amylhydroquinone, 2,6-diphenyl-4-octadecyloxyphenol, 2,6-di-tert-butylhydroquinone, 2,5-di-tert-butyl-4-hydroxyanisole, 3,5-di-tert-butyl-4-hydroxyanisole, 3,5-di-tert-butyl-4-hydroxyphenyl stearate, bis(3,5-di-tert-butyl-4-hydroxyphenyl) adipate. 1.4. Tocopherols, for example α-tocopherol, β-tocopherol, γ-tocopherol, δ-tocopherol and mixtures thereof (vitamin E). 1.5. Hydroxylated thiodiphenyl ethers, for example 2,2′-thiobis(6-tert-butyl-4-methylphenol), 2,2′-thiobis(4-octylphenol), 4,4′-thiobis(6-tert-butyl-3-methylphenol), 4,4′-thiobis(6-tert-butyl-2-methylphenol), 4,4′-thiobis(3,6-di-sec-amylphenol), 4,4′-bis(2,6-dimethyl-4-hydroxyphenyl)disulfide. 1.6. Alkylidenebisphenols, for example 2,2′-methylenebis(6-tert-butyl-4-methylphenol), 2,2′-methylenebis(6-tert-butyl-4-ethylphenol), 2,2′-methylenebis[4-methyl-6-(amethylcyclohexyl)phenol], 2,2′-methylenebis(4-methyl-6-cyclohexylphenol), 2,2′-methylenebis(6-nonyl-4-methylphenol), 2,2′-methylenebis(4,6-di-tert-butylphenol), 2,2′-ethylidenebis(4,6-di-tert-butylphenol), 2,2′-ethylidenebis(6-tert-butyl-4-isobutylphenol), 2,2′-methylenebis[6-(α-methylbenzyl)-4-nonylphenol], 2,2′-methylenebis[6-(α,α-dimethylbenzyl)-4-nonylphenol], 4,4′-methylenebis(2,6-di-tert-butylphenol), 4,4′-methylenebis(6-tert-butyl-2-methylphenol), 1,1-bis(5-tert-butyl-4-hydroxy-2-methylphenyl)butane, 2,6-bis(3-tert-butyl-5-methyl-2-hydroxybenzyl)-4-methylphenol, 1,1,3-tris(5-tert-butyl-4-hydroxy-2-methylphenyl) butane, 1,1-bis(5-tert-butyl-4-hydroxy-2-methyl-phenyl)-3-n-dodecylmercaptobutane, ethylene glycol bis[3,3-bis(3′-tert-butyl-4′-hydroxyphenyl)butyrate], bis(3-tert-butyl-4-hydroxy-5-methyl-phenyl)dicyclopentadiene, bis[2-(3′-tert-butyl-2′-hydroxy-5′-methylbenzyl)-6-tert-butyl-4-methylphenyl]terephthalate, 1,1-bis-(3,5-dimethyl-2-hydroxyphenyl)butane, 2,2-bis(3,5-di-tert-butyl-4-hydroxyphenyl)propane, 2,2-bis(5-tert-butyl-4-hydroxy2-methylphenyl)-4-n-dodecylmercaptobutane, 1,1,5,5-tetra-(5-tert-butyl-4-hydroxy-2-methylphenyl)pentane. 1.7. O-, N- and S-benzyl compounds, for example 3,5,3′,5′-tetra-tert-butyl-4,4′-dihydroxydibenzyl ether, octadecyl-4-hydroxy-3,5-dimethylbenzyl mercaptoacetate, tridecyl-4-hydroxy-3,5-di-tert-butylbenzylmercaptoacetate, tris(3,5-di-tert-butyl-4-hydroxybenzyl)amine, bis(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)dithioterephthalate, bis(3,5-di-tert-butyl-4-hydroxybenzyl)sulfide, isooctyl-3,5-di-tert-butyl-4-hydroxybenzylmercaptoacetate. 1.8. Hydroxybenzylated malonates, for example dioctadecyl-2,2-bis(3,5-di-tert-butyl-2-hydroxybenzyl)malonate, di-octadecyl-2-(3-tert-butyl-4-hydroxy-5-methylbenzyl)malonate, di-dodecylmercaptoethyl-2,2-bis (3,5-di-tert-butyl-4-hydroxybenzyl)malonate, bis[4-(1,1,3,3-tetramethylbutyl)phenyl]-2,2-bis(3,5-di-tertbutyl-4-hydroxybenzyl)malonate. 1.9. Aromatic hydroxybenzyl compounds, for example 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene, 1,4-bis(3,5-di-tert-butyl-4-hydroxybenzyl)-2,3,5,6-tetramethylbenzene, 2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)phenol. 1.10. Triazine compounds, for example 2,4-bis(octylmercapto)-6-(3,5-di-tert-butyl-4-hydroxyanilino)-1,3,5-triazine, 2-octylmercapto-4,6-bis(3,5-di-tert-butyl-4-hydroxyanilino)-1,3,5-triazine, 2-octylmercapto-4,6-bis(3,5-di-tert-butyl-4-hydroxyphenoxy)-1,3,5-triazine, 2,4,6-tris(3,5-di-tert-butyl-4-hydroxyphenoxy)-1,2,3-triazine, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanurate, 2,4,6-tris(3,5-di-tert-butyl-4-hydroxyphenylethyl)-1,3,5-triazine, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)-hexahydro-1,3,5-triazine, 1,3,5-tris(3,5-dicyclohexyl-4-hydroxybenzyl)isocyanurate. 1.11. Benzylphosphonates, for example dimethyl-2,5-di-tert-butyl-4-hydroxybenzylphosphonate, diethyl-3,5-di-tert-butyl-4-hydroxybenzylphosphonate, di-octadecyl3,5-di-tert-butyl-4-hydroxybenzylphosphonate, dioctadecyl-5-tert-butyl-4-hydroxy-3-methylbenzylphosphonate, the calcium salt of the monoethyl ester of 3,5-ditert-butyl-4-hydroxybenzylphosphonic acid. 1.12. Acylaminophenols, for example 4-hydroxylauranilide, 4-hydroxystearanilide, octyl N-(3,5-d i-tert-butyl-4-hydroxyphenyl)carbamate. 1.13. Esters of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid with mono- or polyhydric alcohols, e.g. with methanol, ethanol, n-octanol, i-octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N′-bis(hydroxyethyl)oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo[2.2.2]octane. 1.14. Esters of β-(5-tert-butyl-4-hydroxy-3-methylphenyl)propionic acid with mono- or polyhydric alcohols, e.g. with methanol, ethanol, n-octanol, i-octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N′-bis(hydroxyethyl)oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo[2.2.2]octane; 3,9-bis[2-{3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy}-1,1-dimethylethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane. 1.15. Esters of β-(3,5-dicyclohexyl-4-hydroxyphenyl)propionic acid with mono- or polyhydric alcohols, e.g. with methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N′-bis(hydroxyethyl)oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo[2.2.2]octane. 1.16. Esters of 3,5-di-tert-butyl-4-hydroxyphenyl acetic acid with mono- or polyhydric alcohols, e.g. with methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N′-bis(hydroxyethyl)oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo[2.2.2]octane. 1.17. Amides of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid e.g. N,N′-bis(3,5-ditert-butyl-4-hydroxyphenylpropionyl)hexamethylenediamide, N,N′-bis(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)trimethylenediamide, N,N′-bis(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)hydrazide, N,N′-bis[2-(3-[3,5-di-tert-butyl-4-hydroxyphenyl]propionyloxy)ethyl]oxamide (Naugard®XL-1, supplied by Uniroyal). 1.18. Ascorbic acid (vitamin C) 1.19. Aminic antioxidants, for example N,N′-di-isopropyl-p-phenylenediamine, N,N′-disec-butyl-p-phenylenediamine, N,N′-bis(1,4-dimethylpentyl)-p-phenylenediamine, N,N′-bis(1-ethyl-3-methylpentyl)-p-phenylenediamine, N,N′-bis(1-methylheptyl)-p-phenylenediamine, N,N′-dicyclohexyl-p-phenylenediamine, N,N′-diphenyl-p-phenylenediamine, N,N′-bis(2-naphthyl)-p-phenylenediamine, N-isopropyl-N′-phenyl-p-phenylenediamine, N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine, N-(1-methylheptyl)-N′-phenyl-p-phenylenediamine, N-cyclohexyl-N′-phenyl-p-phenylenediamine, 4-(p-toluenesulfamoyl)diphenylamine, N,N′-dimethyl-N,N′-di-secbutyl-p-phenylenediamine, diphenylamine, N-allyldiphenylamine, 4-isopropoxydiphenylamine, N-phenyl-1-naphthylamine, N-(4-tert-octylphenyl)-1-naphthylamine, N-phenyl-2-naphthylamine, octylated diphenylamine, for example p,p′-di-tert-octyldiphenylamine, 4-n-butylaminophenol, 4-butyrylaminophenol, 4-nonanoylaminophenol, 4-dodecanoylaminophenol, 4-octadecanoylaminophenol, bis(4-methoxyphenyl)amine, 2,6-di-tert-butyl-4-dimethylaminomethylphenol, 2,4′-diaminodiphenylmethane, 4,4′-diaminodiphenylmethane, N,N,N′,N′-tetramethyl-4,4′-diaminodiphenylmethane, 1,2-bis[(2-methylphenyl)amino]ethane, 1,2-bis(phenylamino)propane, (o-tolyl)biguanide, bis[4-(1′,3′-dimethylbutyl)phenyl]amine, tert-octylated N-phenyl-1-naphthylamine, a mixture of mono- and dialkylated tert-butyl/tert-octyldiphenylamines, a mixture of mono- and dialkylated nonyldiphenylamines, a mixture of mono- and dialkylated dodecyldiphenylamines, a mixture of mono- and dialkylated isopropyl/isohexyldiphenylamines, a mixture of mono- and dialkylated tert-butyldiphenylamines, 2,3-dihydro-3,3-dimethyl-4H-1,4-benzothiazine, phenothiazine, a mixture of mono- and dialkylated tert-butyl/tert-octylphenothiazines, a mixture of mono- and dialkylated tert-octyl-phenothiazines, N-allylphenothiazine, N,N,N′,N′-tetraphenyl-1,4-diaminobut-2-ene.

2. UV Absorbers and Light Stabilizers

2.1. 2-(2′-Hydroxyphenyl)benzotriazoles, for example 2-(2′-hydroxy-5′-methylphenyl)benzotriazole, 2-(3′,5′-di-tert-butyl-2′-hydroxyphenyl)benzotriazole, 2-(5′-tert-butyl-2′-hydroxyphenyl)benzotriazole, 2-(2′-hydroxy-5′-(1,1,3,3-tetramethylbutyl)phenyl)benzotriazole, 2-(3′,5′-di-tert-butyl-2′-hydroxyphenyl)-5-chloro-benzotriazole, 2-(3′-tert-butyl-2′-hydroxy-5′-methylphenyl)-5-chloro-benzotriazole, 2-(3′-sec-butyl-5′-tert-butyl-2′-hydroxyphenyl)benzotriazole, 2-(2′-hydroxy-4′-octyloxyphenyl)benzotriazole, 2-(3′,5′-di-tert-amyl-2′-hydroxyphenyl)benzotriazole, 2-(3′,5′-bis-(α,α-dimethyl benzyl)-2′-hydroxyphenyl)benzotriazole, 2-(3′-tert-butyl-2′-hydroxy-5′-(2-octyloxycarbonylethyl)phenyl)-5-chloro-benzotriazole, 2-(3′-tert-butyl-5′-[2-(2-ethylhexyloxy)-carbonylethyl]-2′-hydroxyphenyl)-5-chloro-benzotriazole, 2-(3′-tertbutyl-2′-hydroxy-5′-(2-methoxycarbonylethyl)phenyl)-5-chloro-benzotriazole, 2-(3′-tertbutyl-2′-hydroxy-5′-(2-methoxycarbonylethyl)phenyl) benzotriazole, 2-(3′-tert-butyl-2′-hydroxy-5′-(2-octyloxycarbonylethyl)phenyl)benzotriazole, 2-(3′-tert-butyl-5′-[2-(2-ethylhexyloxy)carbonylethyl]-2′-hydroxyphenyl)benzotriazole, 2-(3′-dodecyl-2′-hydroxy-5′-methylphenyl)benzotriazole, 2-(3′-tert-butyl-2′-hydroxy-5′-(2-isooctyloxycarbonylethyl)phenyl benzotriazole, 2,2′-methylene-bis[4-(1,1,3,3-tetramethylbutyl)-6-benzotriazole-2-ylphenol]; the transesterification product of 2-[3′-tert-butyl-5′-(2-methoxycarbonylethyl)-2′-hydroxyphenyl]-2H-benzotriazole with polyethylene glycol 300; [R—CH₂CH₂—COO—CH₂CH₂₂, where R=3′-tert-butyl-4′-2 hydroxy-5′-2H-benzotriazol-2-ylphenyl, 2-[2′-hydroxy-3′-(α,α-dimethyl benzyl)-5′-(1,1,3,3-tetramethylbutyl)-phenyl]benzotriazole; 2-[2′-hydroxy-3′-(1,1,3,3-tetramethylbutyl)-5′-(α,α-dimethylbenzyl)-phenyl]benzotriazole. 2.2. 2-Hydroxybenzophenones, for example the 4-hydroxy, 4-methoxy, 4-octyloxy, 4-decyloxy, 4-dodecyloxy, 4-benzyloxy, 4,2′,4′-trihydroxy and 2′-hydroxy-4,4′-dimethoxy derivatives. 2.3. Esters of substituted and unsubstituted benzoic acids, for example 4-tert-butylphenyl salicylate, phenyl salicylate, octylphenyl salicylate, dibenzoyl resorcinol, bis(4-tert-butylbenzoyl)resorcinol, benzoyl resorcinol, 2,4-di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate, hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate, octadecyl 3,5-ditert-butyl-4-hydroxybenzoate, 2-methyl-4,6-di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate. 2.4. Acrylates, for example ethyl α-cyano-β,β-diphenylacrylate, isooctyl α-cyano-β,β-diphenylacrylate, methyl α-carbomethoxycinnamate, methyl α-cyano-β-methyl-p-methoxycinnamate, butyl α-cyano-β-methyl-p-methoxy-cinnamate, methyl α-carbomethoxy-p-methoxycinnamate, N-(β-carbomethoxy-β-cyanovinyl)-2-methylindoline, neopentyl tetra(α-cyano-β,β-diphenylacrylate. 2.5. Nickel compounds, for example nickel complexes of 2,2′-thio-bis[4-(1,1,3,3-tetramethylbutyl)phenol], such as the 1:1 or 1:2 complex, with or without additional ligands such as n-butylamine, triethanolamine or N-cyclohexyldiethanolamine, nickel dibutyldithiocarbamate, nickel salts of the monoalkyl esters, e.g. the methyl or ethyl ester, of 4-hydroxy-3,5-di-tert-butylbenzylphosphonic acid, nickel complexes of ketoximes, e.g. of 2-hydroxy-4-methylphenylundecylketoxime, nickel complexes of 1-phenyl-4-lauroyl-5-hydroxypyrazole, with or without additional ligands. 2.6. Sterically hindered amines, for example 1,6-Hexanediamine N,N′-bis(1-propyloxy-2,2,6,6-tetramethyl-4-piperidinyl)-N,N′-bis-2-[4,5-bis-(N-n-butyl-N′-1-propyloxy-2,2,6,6-tetramethyl-4-piperidinyl)-1,3,5-triazine], 1,6-Hexanediamine N,N′-bis(2,2,6,6-tetramethyl-4-piperidinyl)-N,N′-bis-2-[4,5-bis-(N-n-butyl-N′-2,2,6,6-tetramethyl-4-piperidinyl)-1,3,5-triazine], carbonic acid bis(1-undecyloxy-2,2,6,6-tetramethyl-4-piperidyl)ester, bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate, bis(2,2,6,6-tetramethyl-4-piperidyl)succinate, Reaction products of alkanoic acid (C=18,20,22,24, normal chain) and 1,2,2,6,6-pentamethylpiperidin-4-ol, which consist of 1,2,2,6,6-pentamethylpiperidine-4-yl docosanoate as a major component (80% or more), bis(1,2,2,6,6-pentamethyl-4-piperidyl)sebacate, bis(1-undecanoxy-2,2,6,6-tetramethylpiperidin-4-yl)carbonate (CAS Reg. No. [705257-84-7], bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl)sebacate, bis(1,2,2,6,6-pentamethyl-4-piperidyl) n-butyl-3,5-di-tert-butyl-4-hydroxybenzylmalonate, the condensate of 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid, linear or cyclic condensates of N,N′-bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylenediamine and 4-tertoctylamino-2,6-dichloro-1,3,5-triazine, tris(2,2,6,6-tetramethyl-4-piperidyl)nitrilotriacetate, tetrakis(2,2,6,6-tetramethyl-4-piperidyl)-1,2,3,4-butanetetracarboxylate, 1,1′-(1,2-ethanediyl)-bis(3,3,5,5-tetramethylpiperazinone), 4-benzoyl-2,2,6,6-tetramethylpiperidine, 4-stearyloxy-2,2,6,6-tetramethylpiperidine, bis(1,2,2,6,6-pentamethylpiperidyl)-2-n-butyl-2-(2-hydroxy-3,5-di-tert-butylbenzyl)malonate, 3-n-octyl-7,7,9,9-tetramethyl-1,3,8-triazaspiro[4.5]decane-2,4-dione, bis(1-octyloxy-2,2,6,6-tetramethylpiperidyl)sebacate, bis(1-octyloxy-2,2,6,6-tetramethylpiperidyl)succinate, linear or cyclic condensates of N,N′-bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylenediamine and 4-morpholino-2,6-dichloro-1,3,5-triazine, the condensate of 2-chloro-4,6-bis(4-n-butylamino-2,2,6,6-tetramethylpiperidyl)-1,3,5-triazine and 1,2-bis(3-aminopropylamino)ethane, the condensate of 2-chloro-4,6-di-(4-n-butylamino-1,2,2,6,6-pentamethylpiperidyl)-1,3,5-triazine and 1,2-bis(3-aminopropylamino)ethane, 8-acetyl-3-dodecyl-7,7,9,9-tetramethyl-1,3,8-triazaspiro[4.5]decane-2,4-dione, 3-dodecyl-1-(2,2,6,6-tetramethyl-4-piperidyl)pyrrolidine-2,5-dione, 3-dodecyl-1-(1,2,2,6,6-pentamethyl-4-piperidyl)pyrrolidine-2,5-dione, a mixture of 4-hexadecyloxy- and 4-stearyloxy-2,2,6,6-tetramethylpiperidine, a condensate of N,N′-bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylenediamine and 4-cyclohexylamino-2,6-dichloro-1,3,5-triazine, a condensate of 1,2-bis(3-aminopropylamino)ethane and 2,4,6-trichloro-1,3,5-triazine as well as 4-butylamino-2,2,6,6-tetramethylpiperidine (CAS Reg. No. [136504-96-6]); a condensate of 1,6-hexanediamine and 2,4,6-trichloro-1,3,5-triazine as well as N,N-dibutylamine and 4-butylamino-2,2,6,6-tetramethylpiperidine (CAS Reg. No. [192268-64-7]); N-(2,2,6,6-tetramethyl-4-piperidyl)-n-dodecylsuccinimide, N-(1,2,2,6,6-pentamethyl-4-piperidyl)-n-dodecylsuccinimide, 2-undecyl-7,7,9,9-tetramethyl-1-oxa-3,8-diaza-4-oxo-spiro[4,5]decane, a reaction product of 7,7,9,9-tetramethyl-2-cycloundecyl-1-oxa-3,8-diaza-4-oxospiro-[4,5]decane and epichlorohydrin, 1,1-bis(1,2,2,6,6-pentamethyl-4-piperidyloxycarbonyl)-2-(4-methoxyphenyl)ethene, N,N′-bis-formyl-N,N′-bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylenediamine, a diester of 4-methoxymethylenemalonic acid with 1,2,2,6,6-pentamethyl-4-hydroxypiperidine, poly[methylpropyl-3-oxy-4-(2,2,6,6-tetramethyl-4-piperidyl)]siloxane, a reaction product of maleic acid anhydride-α-olefin copolymer with 2,2,6,6-tetramethyl-4-aminopiperidine or 1,2,2,6,6-pentamethyl-4-aminopiperidine, 2,4-bis[N-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidine-4-yl)-N-butylamino]-6-(2-hydroxyethyl)amino-1,3,5-triazine, 1-(2-hydroxy-2-methylpropoxy)-4-octadecanoyloxy-2,2,6,6-tetramethylpiperidine, 5-(2-ethylhexanoyl)oxymethyl-3,3,5-trimethyl-2-morpholinone, Sanduvor (Clariant; CAS Reg. No. 106917-31-1], aminoether HALS/Polymer Hostavin NOW Pills XP (Clariant; CAS Reg. No. [942926-88-7], 5-(2-ethylhexanoyl)oxymethyl-3,3,5-trimethyl-2-morpholinone, the reaction product of 2,4-bis[(1-cyclohexyloxy-2,2,6,6-piperidine-4-yl)butylamino]-6-chloro-s-triazine with N,N′-bis(3-aminopropyl)ethylenediamine), 1,3,5-tris(N-cyclohexyl-N-(2,2,6,6-tetramethylpiperazine-3-one-4-yl)amino)-s-triazine, 1,3,5-tris(N-cyclohexyl-N-(1,2,2,6,6-pentamethylpiperazine-3-one-4-yl)amino)-s-triazine,

2.7 Benzoxazinone derivatives such as e.g. 2,2′-(1,4-phenylene)bis[4H-3,1-benzoxazin-4-one] (CAS No. 018600-59-4). 2.8. Oxamides, for example 4,4′-dioctyloxyoxanilide, 2,2′-diethoxyoxanilide, 2,2′-dioctyloxy-5,5′-di-tert-butoxanilide, 2,2′-didodecyloxy-5,5′-di-tert-butoxanilide, 2-ethoxy-2′-ethyloxanilide, N,N′-bis(3-dimethylaminopropyl)oxamide, 2-ethoxy-5-tert-butyl-2′-ethoxanilide and its mixture with 2-ethoxy-2′-ethyl-5,4′-di-tert-butoxanilide, mixtures of o- and p-methoxy-disubstituted oxanilides and mixtures of o- and p-ethoxydisubstituted oxanilides. 2.9. 2-(2-Hydroxyphenyl)-1,3,5-triazines, for example 2,4,6-tris(2-hydroxy-4-octyloxyphenyl)-1,3,5-triazine, 2-(2-hydroxy-4-octyloxyphenyl)-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-(2,4-dihydroxyphenyl)-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2,4-bis(2-hydroxy-4-propyloxyphenyl)-6-(2,4-dimethylphenyl)-1,3,5-triazine, 2-(2-hydroxy-4-octyloxyphenyl)-4,6-bis(4-methylphenyl)-1,3,5-triazine, 2-(2-hydroxy-4-dodecyloxyphenyl)-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-(2-hydroxy-4-tridecyloxyphenyl)-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-[2-hydroxy-4-(2-hydroxy-3-butyloxypropoxy)phenyl]-4,6-bis(2,4-dimethyl)-1,3,5-triazine, 2-[2-hydroxy-4-(2-hydroxy-3-octyloxypropyloxy)phenyl]-4,6-bis(2,4-dimethyl)-1,3,5-triazine, 2-[4-(dodecyloxy/tridecyloxy-2-hydroxypropoxy)-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-[2-hydroxy-4-(2-hydroxy-3-dodecyloxypropoxy)phenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-(2-hydroxy-4-hexyloxy)phenyl-4,6-diphenyl-1,3,5-triazine, 2-(2-hydroxy-4-methoxyphenyl)-4,6-diphenyl-1,3,5-triazine, 2,4,6-tris[2-hydroxy-4-(3-butoxy-2-hydroxypropoxy)phenyl]-1,3,5-triazine, 2-(2-hydroxyphenyl)-4-(4-methoxyphenyl)-6-phenyl-1,3,5-triazine, 2-{2-hydroxy-4-[3-(2-ethylhexyl-1-oxy)-2-hydroxypropyloxy]phenyl}-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2,4-bis(4-[2-ethylhexyloxy]-2-hydroxyphenyl)-6-(4-methoxyphenyl)-1,3,5-triazine, 2-(4,6-bis-biphenyl-4-yl-1,3,5-triazin-2-yl)-5-(2-ethyl-(n)hexyloxy)phenol. 3. Metal deactivators, for example N,N′-diphenyloxamide, N-salicylal-N′-salicyloyl hydrazine, N,N′-bis(salicyloyl)hydrazine, N,N′-bis(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)hydrazine, 3-salicyloylamino-1,2,4-triazole, bis(benzylidene)oxalyl dihydrazide, oxanilide, isophthaloyl dihydrazide, sebacoyl bisphenylhydrazide, N,N′-diacetyladipoyl dihydrazide, N,N′-bis(salicyloyl)oxalyl dihydrazide, N,N′-bis(salicyloyl)thiopropionyl dihydrazide. 3a. Formamidines, for example Ethoxycarbonylphenyl)-N′-ethyl-N′-phenyl formamidine. 4. Phosphites and phosphonites, for example triphenyl phosphite, diphenylalkyl phosphites, phenyldialkyl phosphites, tris(nonylphenyl) phosphite, trilauryl phosphite, trioctadecyl phosphite, distearylpentaerythritol diphosphite, tris(2,4-di-tert-butylphenyl) phosphite, diisodecyl pentaerythritol diphosphite, bis(2,4-di-tertbutylphenyl)pentaerythritol diphosphite, bis(2,4-di-cumylphenyl)pentaerythritol diphosphite, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite, diisodecyloxypentaerythritol diphosphite, bis(2,4-di-tert-butyl-6-methylphenyl)pentaerythritol diphosphite, bis(2,4,6-tris(tert-butylphenyl)pentaerythritol diphosphite, tristearyl sorbitol triphosphite, tetrakis(2,4-di-tert-butylphenyl) 4,4′-biphenylene diphosphonite, 6-isooctyloxy-2,4,8,10-tetra-tert-butyl-12H-dibenz[d,g]-1,3,2-dioxaphosphocin, bis(2,4-ditert-butyl-6-methylphenyl)methyl phosphite, bis(2,4-di-tert-butyl-6-methylphenyl)ethyl phosphite, 6-fluoro-2,4,8,10-tetra-tert-butyl-12-methyl-dibenz[d,g]-1,3,2-dioxaphosphocin, 2,2′,2″-nitrilo[triethyltris(3,3′,5,5′-tetra-tert-butyl-1,1′-biphenyl-2,2′-diyl)phosphite], 2-ethylhexyl(3,3′,5,5′-tetra-tert-butyl-1,1′-biphenyl-2,2′-diyl)phosphite, 5-butyl-5-ethyl-2-(2,4,6-tri-tert-butylphenoxy)-1,3,2-dioxaphosphirane, phosphorus acid, mixed 2,4-bis(1,1-dimethylpropyl)phenyl and 4-(1,1-dimethyl)phenyltriesters (CAS Reg. No. [939402-02-5], Phosphorus acid, triphenyl ester, polymer with alpha-hydro-omega-hydroxypoly[oxy(methyl-1,2-ethanediyl)], C₁₀₋₁₆ alkyl esters (CAS Reg. No. [1227937-46-3].

The following phosphites are especially preferred:

Tris(2,4-di-tert-butylphenyl) phosphite (Irgafos®168, BASF SE), tris(nonylphenyl) phosphite, phosphorus acid mixed 2,4-bis(1,1-dimethylpropyl)phenyl and 4-(1,1-dimethylpropyl)phenyl triesters (CAS Reg. No. 939402-02-5), phosphorous acid triphenyl ester polymer with alpha-hydro-omega-hydroxypoly[oxy(methyl-1,2-ethanediyl) C₁₀₋₁₆ alkyl esters (CAS Reg. No. 1227937-46-3).

5. Hydroxylamines, for example N,N-dibenzylhydroxylamine, N,N-diethylhydroxylamine, N,N-dioctylhydroxylamine, N,N-dilaurylhydroxylamine, N,N-ditetradecylhydroxylamine, N,N-dihexadecylhydroxylamine, N,N-dioctadecylhydroxylamine, N-hexadecyl-N-octadecylhydroxylamine, N-heptadecyl-N-octadecylhydroxylamine, N,N-dialkylhydroxylamine derived from hydrogenated tallow amine. 6. Amine oxides, for example N,N-dibenzylhydroxylamine oxide, N,N-diethylhydroxylamine oxide, N,N-dioctylhydroxylamine oxide, N,N-dilaurylhydroxylamine oxide, N,N-ditetradecylhydroxylamine oxide, N,N-dihexadecylhydroxylamine oxide, N,N-dioctadecylhydroxylamine oxide, N-hexadecyl-N-octadecylhydrox-ylamine oxide, N-heptadecyl-N-octadecylhydroxylamine oxide, N,N-dialkylhydroxylamine oxide derived from hydrogenated tallow amine. 7. Nitrones, for example, N-benzyl-alpha-phenylnitrone, N-ethyl-alpha-methylnitrone, N-octyl-alpha-heptylnitrone, N-lauryl-alpha-undecylnitrone, N-tetradecyl-alphatridecylnnitrone, N-hexadecyl-alpha-pentadecylnitrone, N-octadecyl-alpha-heptadecylnitrone, N-hexadecyl-alpha-heptadecylnitrone, N-ocatadecyl-alpha-pentadecylnitrone, N-heptadecyl-alpha-heptadecylnitrone, N-octadecyl-alphahexadecylnitrone, nitrone derived from N,N-dialkylhydroxylamine derived from hydrogenated tallow amine. 8. Thiosynergists, for example dilauryl thiodipropionate, dimistryl thiodipropionate, distearyl thiodipropionate, pentaerythritol tetrakis[3-(dodecylthio)propionate] or distearyl disulfide. 9. Peroxide scavengers, for example esters of β-thiodipropionic acid, for example the lauryl, stearyl, myristyl or tridecyl esters, mercaptobenzimidazole or the zinc salt of 2-mercaptobenzimidazole, zinc dibutyldithiocarbamate, dioctadecyl disulfide, pentaerythritol tetrakis(β-dodecylmercapto)propionate. 10. Polyamide stabilizers, for example copper salts in combination with iodides and/or phosphorus compounds and salts of divalent manganese. 11. Basic co-stabilizers, for example melamine, polyvinylpyrrolidone, dicyandiamide, triallyl cyanurate, urea derivatives, hydrazine derivatives, amines, polyamides, polyurethanes, alkali metal salts and alkaline earth metal salts of higher fatty acids, for example calcium stearate, zinc stearate, magnesium behenate, magnesium stearate, sodium ricinoleate and potassium palmitate, antimony pyrocatecholate or zinc pyrocatecholate, zeolithes, hydrotalcites, hydrocalumites. 12. Nucleating agents, for example inorganic substances, such as talcum, metal oxides, such as titanium dioxide or magnesium oxide, phosphates, carbonates or sulfates of, preferably, alkaline earth metals; organic compounds, such as mono- or polycarboxylic acids and the salts thereof, e.g. 4-tert-butylbenzoic acid, adipic acid, diphenylacetic acid, sodium succinate or sodium benzoate; polymeric compounds, such as ionic copolymers (ionomers). Especially preferred are 1,3:2,4-bis(3′,4′-dimethylbenzylidene)sorbitol, 1,3:2,4-di(paramethyldibenzylidene)sorbitol, and 1,3:2,4-di(benzylidene)sorbitol. 13. Fillers and reinforcing agents, for example calcium carbonate, silicates, glass fibres, carbon fibers, glass beads, asbestos, talcum (preferably with a particle size of 0.01 to 20 μm), kaolin, mica, barium sulfate, metal oxides and hydroxides, carbon black, graphite, wood flour and flours or fibers of other natural products, synthetic fibers. 14. Other additives, for example plasticisers, lubricants, emulsifiers, pigments, rheology additives, catalysts, flow-control agents, optical brighteners, flameproofing agents, antistatic agents and blowing agents. 15. Benzofuranones and indolinones, for example those disclosed in U.S. Pat. Nos. 4,325,863; 4,338,244; 5,175,312; 5,216,052; 5,252,643; DE-A-4316611; DE-A-4316622; DE-A-4316876; EP-A-0589839, EP-A-0591102; EP-A-1291384 or 3-[4-(2-acetoxyethoxy)phenyl]-5,7-di-tert-butylbenzofuran-2-one, 5,7-di-tert-butyl-3-[4-(2-stearoyloxyethoxy)phenyl]benzofuran-2-one, 3,3′-bis[5,7-di-tert-butyl-3-(4-[2-hydroxyethoxy]phenyl)benzofuran-2-one], 5,7-di-tert-butyl-3-(4-ethoxyphenyl)benzofuran-2-one, 3-(4-acetoxy-3,5-dimethylphenyl)-5,7-di-tertbutylbenzofuran-2-one, 3-(3,5-dimethyl-4-pivaloyloxyphenyl)-5,7-di-tertbutylbenzofuran-2-one, 3-(3,4-dimethylphenyl)-5,7-di-tert-butylbenzofuran-2-one, 3-(2,3-dimethylphenyl)-5,7-di-tert-butylbenzofuran-2-one, 3-(2-acetyl-5-isooctylphenyl)-5-isooctylbenzofuran-2-one.

Phenolic antioxidants are preferred. Of interest are those listed above under item 1. Of particular interest are phenolic antioxidants and process stabilizers such as pentaerythritol tetrakis[3,5-di-tert-butyl-4-hydroxyphenylpropionate], octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)proprionate, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene, N,N′-bis(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)hexamethylene-diamide, 1,3,5-tris[3,5-di-tert-butyl-4-hydroxybenzyl]isocyanurate, 2,4-di-t-butylphenyl-3,5-di-t-butyl-4-hydroxybenzoate, bis(1,2,2,6,6-pentamethylpiperidin-4-yl)-butyl(3,5-di-t-butyl-4-hydroxybenzyl)malonate) and tris[2,4-di-tert-butylphenyl]phosphite.

Further preferred additives are pentaerythritol tetrakis[3-(dodecylthio)propionate] and Ca stearate.

Pigments such as TiO₂ and carbon black are further preferred. Fillers such as talc are also of interest.

Preferred additives are also sterically hindered amine light stabilizers and/or UV-absorbers, in particular those listed above under item 2.

The additive mixture according to the present invention is preferably applied together with a phenolic antioxidant, preferably pentaerythritol tetrakis[3,5-di-tert-butyl-4-hydroxyphenylpropionate], a phosphite, preferably tris[2,4-di-tert-butylphenyl]phosphite, an acid scavenger, preferably Ca stearate, and carbon black and talk.

The weight ratio of the compound of the formula (I) to the conventional additive is for example 1:100 to 100:1, preferably 1:100 to 10:1, in particular 1:10 to 10:1.

Another object of the present invention is a method for stabilizing an organic material against degradation induced by light, heat or oxidation with reduced blooming, which comprises incorporating into said organic material at least one compound of the formula (I) and at least one anti-scratch additive.

The examples below illustrate the invention in greater detail. All percentages and parts mentioned in the present application are by weight, unless stated otherwise.

EXAMPLE 1

Base Formulation:

78.3% by weight of thermoplastic polyolefin (Daplen® EE013 AE of Borealis; Melt Flow Rate: 11 g/10 min (ISO 1133); Density: 905 kg/m³ (ISO 1183)), 20% by weight of talc, 1.5% by weight of carbon black, 0.1% by weight of tris(2,4-di-tert-butylphenyl)phosphite, 0.05% by weight of calcium stearate and 0.05% by weight of pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate).

Further additives, as outlined below, are incorporated with the same method as for the base formulation. In every case, the percentage by weight of the thermoplastic polyolefin is adjusted to have the sum of all ingredients giving 100%.

Preparation of the Tested Specimen:

The base formulation is pre-mixed in a high-speed mixer. This mixture is combined with the further additives listed in Tables 1 to 3 in a high-speed mixer and then compounded in a twin-screw extruder Berstorff ZE 25×32D at 230° C. The full formulation is then injection molded on an Engel HL65 injection molding machine. The injection molded plaques (60 mm×60 mm×2 mm) are exposed to artificial weathering according to the international norm DIN EN ISO 105-B06 (Xenon light, irradiance 1.20 W/(m² nm) @ 420 nm, dry bulb temperature 65° C., relative humidity 30%+/−5%). The parameters measured are color deviation (gray scale and Delta E*) and gloss at 60°. The results are listed in Tables 1, 2 and 3.

TABLE 1 Gray scale (High values are desired.) Hours exposure 0 303 602 Base formulation 5.00 4.62 2.25 Base formulation + 0.2% 5.00 4.81 4.58 Compound (A) + 0.4% erucamide

TABLE 2 Delta E (Low values are desired.) Hours exposure 0 303 602 1110 1997 2977 Base formulation 0.00 0.65 5.71 Base formulation + 0..00 0.27 0.50 0.53 0.78 2.53 0.2% Compound (A) Base formulation + 0.00 0.18 0.19 0.61 9.07 17.84 0.4% erucamide Base formulation + 0.00 0.32 0.72 0.97 1.02 1.21 0.2% Compound (A) + 0.4% erucamide

TABLE 3 Gloss at 60° (High values are desired.) Hours exposure 0 303 602 1110 1997 2977 5467 Base formulation 26.90 9.80 4.00 Base formulation + 28.50 20.50 21.10 19.00 19.30 19.00 5.50 0.2% Compound (A) Base formulation + 43.00 23.90 22.40 10.30 0.30 0.20 0.4% erucamide Base formulation + 33.50 20.40 19.00 18.10 15.90 16.50 11.20 0.2% Compound (A) + 0.4% erucamide

The results shown above clearly reveal that the combination of Compound (A) plus erucamide provides a better retention of the properties of the tested thermoplastic polyolefin and better scratch resistance than Compound (A) or erucamide alone.

EXAMPLE 2

The injection molded plaques which are prepared as described in Example 1 are exposed to artificial weathering (Xenon light, irradiance 40 W/m2 @ 300-400 nm, dry bulb temperature 45° C., relative humidity 20%+/−10%). The tackiness of the surface of the exposed samples is assessed after several durations of exposure and rated according to the scale shown below:

1 No tackiness 2 Light exuding but no tackiness 3 Light tackiness

4 Tackiness

5 Strong tackiness 6 Gummy surface 7 Waxy surface

The results are listed in Table 4.

TABLE 4 Tackiness (Low values are desired.) Hours exposure 153 300 450 600 750 894 1060 1200 1528 2026 Base formulation + 1.0 1.0 1.0 1.0 1.0 1.5 2.0 2.0 2.0 2.0 0.2% Compound (A) + 0.4% erucamide

This example shows that the combination of Compound (A) plus erucamide provides a surface which shows no tackiness over the exposure time.

EXAMPLE 3

Injection molded plaques which are prepared in analogy to Example 1 are placed in a hot air oven with forced air convection heating at 150° C. The samples are inspected periodically. The criteria is embrittlement, assessed by visual inspection. The results are listed in Table 5.

TABLE 5 Long-term thermal stability (High values are desired.) Days to embrittlement Base formulation + 0.2% Compound A + 0.4% 46 erucamide

This example shows that the additive mixture of Compound (A)+erucamide provides the base formulation with a long-term thermal stability. 

1: An additive mixture comprising: (A) at least one compound of the formula (I)

wherein R₁ and R₂ independently of one another are hydrogen, C₁-C₂₂alkyl, —O—, —OH, —CH₂CN, C₁-C₁₈alkoxy, C₂-C₁₈alkoxy substituted by —OH; C₅-C₁₂cycloalkoxy, C₃-C₆alkenyl, C₃-C₆alkenyloxy, C₇-C₉phenylalkyl unsubstituted or substituted on the phenyl by 1, 2 or 3 C₁-C₄alkyl; or C₁-C₈acyl; and R₃ and R₄ independently of one another are C₁-C₂₂alkyl or a group of the formula (Ia)

wherein R₀ has one of the meanings of R₁ and R₂, and (B) at least one anti-scratch additive. 2: The additive mixture according to claim 1, wherein R₁ and R₂ independently of one another are hydrogen, C₁-C₈alkyl, C₁-C₁₈alkoxy or cyclohexyloxy; and R₃ and R₄ independently of one another are C₁-C₆alkyl. 3: The additive mixture according to claim 1, wherein the compound of the formula (I) is the compound (A)

4: The additive mixture according to claim 1, wherein the anti-scratch additive is an unsaturated or saturated fatty acid amide or a poly(organo)siloxane or a mixture thereof. 5: A composition comprising an organic material susceptible to degradation induced by light, heat or oxidation, and an additive mixture according to claim
 1. 6: The composition according to claim 5, wherein the organic material is a polyolefin, an acrylonitrile/butadiene/styrene, a polyvinyl chloride, a polymethylmethacrylate, a polyamide or a polyoxymethylene. 7: The composition according to claim 5, wherein the organic material is a thermoplastic polyolefin, preferably a thermoplastic polyethylene or polypropylene. 8: The composition according to claim 5, which further comprises a phenolic antioxidant and/or a phenolic phosphite. 9: The composition according to claim 8, wherein the phenolic antioxidant is pentaerythritol tetrakis[3,5-di-tert-butyl-4-hydroxyphenylpropionate], octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)proprionate, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene, N,N′-bis(3,5-di-tertbutyl-4-hydroxyphenylpropionyl)hexamethylene-diamide or 1,3,5-tris[3,5-di-tert-butyl-4-hydroxybenzyl]isocyanurate, 2,4-di-t-butylphenyl-3,5-di-t-butyl-4-hydroxybenzoate or bis(1,2,2,6,6-pentamethylpiperidin-4-yl)-butyl(3,5-di-t-butyl-4-hydroxybenzyl)malonate), and the phenolic phosphite is tris[2,4-di-tert-butylphenyl]phosphite. 10: The composition according to claim 5, which further comprises a sterically hindered amine light stabilizer different from the compound of the formula (I) and/or an UV-absorber. 11: The composition according to claim 10, wherein the UV-absorber is selected from the group consisting of 2-(2′-hydroxyphenyl)benzotriazoles, 2-hydroxybenzophenones, oxamides and 2-(2-hydroxyphenyl)-1,3,5-triazines. 12: The composition according to claim 5, which further comprises a filler and/or a pigment. 13: An article comprising a composition according to claim
 5. 14: The article according to claim 13, which is an automotive interior or exterior trim material. 15: A method for stabilizing an organic material against degradation induced by light, heat or oxidation, the method comprising: incorporating into said organic material an additive mixture according to claim
 1. 